This video contain description about Readme.md, Tsconfig.json and Angular.json. Also you will learn how to debug angular code in chrome browser. Also you will seethe importance of this configuration files in Angular project.
So in simple terms angular.json file is nothing but a configuration file used to configure the architecture of whole angular application. It's a way to tell CLI that where can you find main file, index.html file, css file and many more files which are used to bootstrap your angular application. If you have multiple internal projects in one application then the location of files that are required to start your angular application is actually mentioned here. CLI reads that information from here and automatically loads all these files so that you can see your results in browser.
Still if you find this explanation complex and if you are not able to follow, please mail me your contact number at codergaming25@gmail.com. i will connect with you to explain it better.